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#Gearcutting
#Gearcutting
Please see the attached video of cutting the keyways using a sub routine g code and DDCS controller.
Basically the X axis is central with the bore, the Y axis is set to a finished depth. Z axis moves up and down, an increment of cut added Y to each stroke until final depth of the keyway, At that point the machine returns to home position. Typical of a actions of a slotting machine, but using a vertical mill hands off. Hope of interest. John -- John |
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#Gearcutting
#Gearcutting
Good morning members.
This months cover photo shows a group of gears that I machined using a CNC DDCS control box, and home made indexing head, and a sub routine g code. These gears replace the original factory plastic gears in a Real Bull mini lathe. I did buy a set of replacement gears steel gears, but these were very noisy, as the center line distance or pitch diameter between mating teeth was excessive.So decided to make my own using aluminium. Photos show 12 T 20T 21T 29T gears and the use of a MOD 2 involute gear cutter. The root diameter of the teeth were cut? out using a 3 mm wide slitting saw. Any questions please ask Thanks -- John |
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Re: Mini-mill CNC conversions
#CNC
#MILLS
#poll-notice
All my attempts to straighten out the photos from my previous post above have been unsuccessful, so I am reposting them here in, hopefully, the correct order.
-- Regards, Charlie New Jersey, USA ? ? |
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Re: Mini-mill CNC conversions
#CNC
#MILLS
#poll-notice
Hello, All,
For the sake of voting, I assumed that "Yes" choice #1 meant "yes", and "Yes" choice #2 meant "no". We might adopt that until John has a chance to change the post. *Note: for reasons that I can't explain, Groups swapped my 2nd and 3rd photos with my 4th and 5th photos. Yet if I go in to edit, they are in the correct positions. Sorry for any confusion. About a year ago, I purchased a Grizzly ShopFox M1116 mill. While my original Real Bull mill had produced a great deal of good work, (mostly in spite of me, not because of me!), I had decided that I wanted the following improvements from the Real Bull.
I quickly grew tired of cranking the X-axis back and forth manually while machining, so I added a power feed with mechanical advice from John (his mill is similar to mine) and programming from Richard Edwards in the UK. Since I knew from my sore arm that I would quickly want to power the Z-axis, I built the control box to handle both the X-axis and Z-axis. The mechanical mod for the X-axis involved removing the X-table end plate, removing most of the boss to expose the lead screw end and adding threaded mounting holes for the motor plate, making a plate to hold the motor and spacers to mount the plate, and mounting and aligning the motor and coupling. For those interested, the stepper is a NEMA 23 motor with 3.0 Nm holding torque. It has proven to be quite adequate. I built the simple control box next and used JBWeld to affix a bracket to the motor and the control box to the bracket. Then it was on to the electronics. Richard's design was based on an Arduino Nano, but was intended for one axis. He kindly modified it for me to handle two axes. I fit the power supply, two DM556T stepper motor drivers, the Nano, and all the other goodies to make it work into a housing. I worked in the thermal printer industry for many years, and an ongoing problem was grit getting into the mechanisms in less than pristine environments. So I have gotten into the habit of pressurizing the inside of electronic housings so that air is always flowing out, minimizing the chance of particles getting in. That's why the cooling fan is on the bottom. The clear plastic hood on the front is an air vent flow director, available from any hardware store. It blows the exhausted cooling air down, again to minimize particle entry. The finished X-axis implementation is shown below. The wire loop on top is just to block the openings for the not-yet-installed Z-axis control. ? At about this time, I realized that, once the Z-axis power feed was installed, I had 2/3 of the hardware mods needed to implement a CNC system! I will document the? implement the Z-axis in a following post.? I hope this is of interest, and would be happy to provide any details or answer any questions. -- Regards, Charlie New Jersey, USA SATTINGER¡¯S LAW: It works better if you plug it in. |
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Re: Could/would someone summarize state of this ELS for me?
Hi Ralph. Glad you are staying well and active. Cheers John On Sun, 21 May 2023 at 17:21, Ralph Hulslander <rhulslander@...> wrote:
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John |
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Good morning members.
Hoping that the reintroduction of the RELS files and photos will be of interest. I have changed this months cover photo showing the DDCS V 2.1 control box, I use a Weiss mini mill with stepper motors to X Y Z and a controlled A Axis, indexer. There are newer versions available as mine is 4 years old. Search the web if anyone is interested. This control box handles all my needs for profile milling and? multi tooth gear cutting. I recently had a small parameter setting problem with Backlash control speeds, but the ?support of the DDCS technical guys was more than excellent, all sorted out within a week? again this version I am running was developed up to 6 years ago and? still get the support I needed. For those who run routers, then this system is worth considering.? I am in no way sponsoring or being financially supported by this excellent Chinese based company. There is a #CNC for ease of searching this content, I hope to post more photos in this section within a few days. Hope this post is of interest, and please ask questions, -- John |
John Lindo